Russia added Ukraine to the list of possible perpetrators that helped attack its military bases in Syria with a swarm of drones.

Russia said that the drones required sophisticated engineering and targeting help that originated outside of Syria.

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Every analyst and expert that Business Insider spoke with questioned Russia's claims — and some flat out called them false.

Russia hinted on Thursday that Ukraine manufactured the explosives used in an attempted drone attack on its military bases in Syria, following claims linking Turkey and the US to the attack.

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"Preliminary research has shown that PETN was used as a base for an explosive substance used in that ammo, which is more powerful than hexogen. The specified explosive is produced in a number of countries, including at Ukraine’s Shostka Chemical Reagents Plant," Major General Alexander Novikov said in a Russian Ministry of Defense release.

The Ukrainian Ministry of Defense denied the allegations, according to Hromadske, a Ukrainian media outlet.

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Russia's Hmeymim air base and Tartus Naval Facility in Syria were attacked overnight with a swarm of 13 drones on January 5 and 6, but were seemingly successfully repelled.

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Moscow has since released a number of pictures of the drones, which were fixed-wing UAVs made of wood and tape and powered by small internal combustion engines seen on lawn mowers.

Russia has continuously claimed the drones came from a local force that was backed by an outside power. But experts told Business Insider that the drones could have been constructed and operated without any outside help.

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"I could literally turn 10 drones on right now in a field by myself and tell them to fly to a specific coordinate," Brett Velicovich, a leading expert in drones and author of "Drone Warrior," told Business...